CN108141309B - Method and device for measuring and feeding back Channel State Information (CSI) - Google Patents

Method and device for measuring and feeding back Channel State Information (CSI) Download PDF

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CN108141309B
CN108141309B CN201580084067.0A CN201580084067A CN108141309B CN 108141309 B CN108141309 B CN 108141309B CN 201580084067 A CN201580084067 A CN 201580084067A CN 108141309 B CN108141309 B CN 108141309B
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CN108141309A (en
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刘鹍鹏
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation

Abstract

A method for feeding back CSI is characterized in that a receiving end receives CSI process configuration information, the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources; the receiving end obtains target reference signal resources from the K reference signal resources and target interference measurement resources according to the M interference measurement resources aiming at the first CSI process; obtaining CSI according to the target reference signal resource and the target interference measurement resource; the receiving end sends the CSI, the CSI comprises a target index, and the target index is used for representing the target reference signal resource and/or the target interference measurement resource, so that the flexibility of CSI feedback is improved.

Description

Method and device for measuring and feeding back Channel State Information (CSI)
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for measuring and feeding back CSI (Channel state information).
Background
With the development of wireless communication technology, higher requirements are put on the throughput and rate of a system, and MIMO (Multiple-Input Multiple-Output) technology is applied, the MIMO technology can fully utilize spatial characteristics, improve the system capacity without increasing the transmission power and bandwidth, and meanwhile, the MIMO technology has important roles in improving the peak rate and reliability of data transmission, expanding coverage, suppressing interference, increasing the system capacity and improving the system throughput.
In the conventional 2D MIMO technology, 1D antennas are adopted, that is, the antennas are only arranged in the horizontal direction, as shown in fig. 1A and 1B, all terminals use a fixed downtilt angle, and the beam direction can only be adjusted in the horizontal direction. With the development of the technology, a 2D antenna, i.e., a 3D mimo technology is introduced, and as shown in fig. 1C, 1D, 1E, and 1F, the 2D antenna can perform adjustment of the direction of a beam in both the horizontal direction and the vertical direction, and has a greater degree of freedom.
Under the 3d MOMO technology, the expression form of W1 is shown in formula I:
Figure GPA0000243039860000021
wherein the content of the first and second substances,
Figure GPA0000243039860000022
and
Figure GPA0000243039860000023
in this case, when the terminal feeds back the PMI related to W1 to the base station, two-dimensional PMI (Precoding Matrix Indicators) needs to be fed back, but there is no method for measuring and feeding back CSI for the 3D MIMO technology.
Disclosure of Invention
The embodiment of the invention provides a method and a device for feeding back CSI, which are used for improving the flexibility of feeding back the CSI.
A method of feeding back channel state information, CSI, comprising:
a receiving end receives CSI process configuration information, wherein the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources;
the receiving end obtains target reference signal resources from the K reference signal resources and target interference measurement resources according to the M interference measurement resources aiming at the first CSI process;
obtaining CSI according to the target reference signal resource and the target interference measurement resource;
and the receiving end sends the CSI, wherein the CSI comprises a target index, and the target index is used for representing the target reference signal resource and/or the target interference measurement resource.
A method of feeding back channel state information, CSI, comprising:
a sending end sends CSI process configuration information, wherein the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources;
the sending end receives the CSI, the CSI comprises a target index, the target index is used for representing the target reference signal resource and/or the target interference measurement resource, the CSI is obtained according to the target reference signal resource and the target interference measurement resource, the target interference measurement resource is obtained according to the target reference signal resource from the K reference signal resources and is obtained according to the M interference measurement resources.
A method of feeding back channel state information, CSI, comprising:
a sending end acquires resource configuration information of a first reference signal, and acquires the first reference signal according to the resource configuration information, wherein the number of ports corresponding to the first reference signal is X, the X is a positive integer greater than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to each orthogonal spread spectrum code in the orthogonal spread spectrum codes with the same length are different;
the sending end carries out channel measurement according to the first reference signal and determines Channel State Information (CSI);
and the sending end sends the CSI.
A method of feeding back channel state information, CSI, comprising:
a receiving end sends resource configuration information of a first reference signal, the number of ports corresponding to the first reference signal is X, the X is a positive integer greater than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to each orthogonal spread spectrum code in the orthogonal spread spectrum codes with the same length are different;
and the receiving end receives the CSI.
The embodiment of the invention provides a method for feeding back CSI.A receiving end receives CSI process configuration information, the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources; the receiving end obtains target reference signal resources from the K reference signal resources and target interference measurement resources according to the M interference measurement resources aiming at the first CSI process; obtaining CSI according to the target reference signal resource and the target interference measurement resource; the receiving end sends the CSI, the CSI comprises a target index, and the target index is used for representing the target reference signal resource and/or the target interference measurement resource, so that the flexibility of CSI feedback is improved.
Drawings
Fig. 1 is a flowchart of feeding back CSI according to an embodiment of the present invention;
fig. 2 is a flowchart of another CSI feedback method according to an embodiment of the present invention;
fig. 3 is a flowchart of another CSI feedback method according to an embodiment of the present invention.
Fig. 4 is a flowchart of another CSI feedback method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a receiving end according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a method for feeding back CSI, which comprises the following steps:
step 100: a receiving end receives CSI process configuration information, wherein the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources;
step 110: the receiving end obtains target reference signal resources from the K reference signal resources and target interference measurement resources according to the M interference measurement resources aiming at the first CSI process;
step 120: obtaining CSI according to the target reference signal resource and the target interference measurement resource;
step 130: and the receiving end sends the CSI, wherein the CSI comprises a target index, and the target index is used for representing the target reference signal resource and/or the target interference measurement resource.
In this implementation, the base station may indicate which of the terminals M.
Optionally, when the target reference signal resource is obtained from the K reference signal resources, the method specifically includes:
selecting a target reference signal resource from the K reference signal resources;
obtaining target interference measurement resources according to the M interference measurement resources, including:
selecting a target interference measurement resource from the K interference measurement resources; or taking the average value of the K interference measurement resources as a target interference measurement resource.
Optionally, the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
Further, before obtaining CSI according to the target reference signal resource and the target interference measurement resource, the method further includes:
and receiving a measurement mode indication sent by a base station, and acquiring a mode adopted when CSI is acquired according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
Optionally, for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, the position of the RE of the first reference signal resource is indicated by K second reference signal resources, and the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
Optionally, the K is related to a length of an orthogonal spreading code used by the first reference signal resource and/or a spreading manner of the first reference signal resource.
Optionally, if the length of the orthogonal spreading code used by the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the second reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
Referring to fig. 2, another method for feeding back CSI is proposed in the present invention, which comprises the following steps:
step 200: a sending end sends CSI process configuration information, wherein the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources;
step 210: the sending end receives the CSI, the CSI comprises a target index, the target index is used for representing the target reference signal resource and/or the target interference measurement resource, the CSI is obtained according to the target reference signal resource and the target interference measurement resource, the target interference measurement resource is obtained according to the target reference signal resource from the K reference signal resources and is obtained according to the M interference measurement resources.
Optionally, the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
Further, before the sending end receives the CSI, the method further includes:
and the sending end sends a measurement mode indication so that the receiving end obtains the mode adopted when the CSI is obtained according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
Optionally, for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, the position of the RE of the first reference signal resource is indicated by K second reference signal resources, and the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
Optionally, the K is related to a length of an orthogonal spreading code used by the first reference signal resource and/or a spreading manner of the first reference signal resource.
Optionally, if the length of the orthogonal spreading code used by the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the second reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
Referring to fig. 3, another method for feeding back CSI is proposed in the embodiment of the present invention, which comprises the following steps
Step 300: a sending end acquires resource configuration information of a first reference signal, and acquires the first reference signal according to the resource configuration information, wherein the number of ports corresponding to the first reference signal is X, the X is a positive integer greater than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to each orthogonal spread spectrum code in the orthogonal spread spectrum codes with the same length are different;
step 310: the sending end carries out channel measurement according to the first reference signal and determines Channel State Information (CSI);
step 320: and the sending end sends the CSI.
Optionally, the resource location of the first reference signal is indicated by resource locations of K second reference signals, and the number of ports corresponding to each of the K second reference signals is NkSaid N iskIs a positive integer of 1 or more and 8 or less, X is equal to K and NkThe product of (a).
Optionally, when the length of the orthogonal spreading code is 4, the set of configurations corresponding to the second reference signal is a first set, and when the length of the orthogonal spreading code is 2, the set of configurations corresponding to the second reference signal is a second set, where the second set includes the first set.
Optionally, when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals. For the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
Optionally, when the length of the orthogonal spreading code is 2, the number of adjacent orthogonal frequency division multiplexing OFDM symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and the occupied 4 OFDM symbols are not greater than 3 OFDM symbols.
Optionally, when the length of the orthogonal spreading code is 4, a sequence generation manner of the first reference signal is as follows:
Figure GPA0000243039860000081
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
Referring to fig. 4, another method for feeding back CSI is proposed in the embodiment of the present invention, which comprises the following steps
Step 400: a receiving end sends resource configuration information of a first reference signal, the number of ports corresponding to the first reference signal is X, the X is a positive integer greater than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to each orthogonal spread spectrum code in the orthogonal spread spectrum codes with the same length are different;
step 410: and the receiving end receives the CSI.
Optionally, the resource location of the first reference signal is indicated by resource locations of K second reference signals, and the number of ports corresponding to each of the K second reference signals is NkSaid N iskIs a positive integer of 1 or more and 8 or less, X is equal to K and NkThe product of (a).
Optionally, when the length of the orthogonal spreading code is 4, the set of configurations corresponding to the second reference signal is a first set, and when the length of the orthogonal spreading code is 2, the set of configurations corresponding to the second reference signal is a second set, where the second set includes the first set.
Optionally, when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals. For the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
Optionally, when the length of the orthogonal spreading code is 2, the number of adjacent orthogonal frequency division multiplexing OFDM symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and the occupied 4 OFDM symbols are not greater than 3 OFDM symbols.
Optionally, when the length of the orthogonal spreading code is 4, a sequence generation manner of the first reference signal is as follows:
Figure GPA0000243039860000091
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
Referring to fig. 5A, a receiving end is further proposed, which includes a receiving unit 50, a processing unit 51 and a sending unit 52, wherein:
a receiving unit 50, configured to receive CSI process configuration information, where the CSI process configuration information includes at least one CSI process, and a first CSI process of the at least one CSI process is associated with K reference signal resources and M interference measurement resources, respectively;
a processing unit 51, configured to, for the first CSI process, obtain a target reference signal resource from the K reference signal resources, and obtain a target interference measurement resource according to the M interference measurement resources;
obtaining CSI according to the target reference signal resource and the target interference measurement resource;
a sending unit 52, configured to send the CSI, where the CSI includes a target index, and the target index is used to characterize the target reference signal resource and/or the target interference measurement resource.
Optionally, when the processing unit 51 obtains the target reference signal resource from the K reference signal resources, specifically, the method includes:
selecting a target reference signal resource from the K reference signal resources;
when the processing unit 51 obtains the target interference measurement resource according to the M interference measurement resources, the method specifically includes:
selecting a target interference measurement resource from the K interference measurement resources; or taking the average value of the K interference measurement resources as a target interference measurement resource.
Optionally, the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
Further, the receiving unit 50 is further configured to:
and receiving a measurement mode indication sent by a base station, and acquiring a mode adopted when CSI is acquired according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
Optionally, for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, the position of the RE of the first reference signal resource is indicated by K second reference signal resources, and the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
Optionally, the K is related to a length of an orthogonal spreading code used by the first reference signal resource and/or a spreading manner of the first reference signal resource.
Optionally, if the length of the orthogonal spreading code used by the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the second reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
Referring to fig. 5B, a receiving end is further proposed, which includes a receiver 500, a processor 510 and a transmitter 520, wherein:
a receiver 500, configured to receive CSI process configuration information, where the CSI process configuration information includes at least one CSI process, and a first CSI process of the at least one CSI process is associated with K reference signal resources and M interference measurement resources, respectively;
a processor 510, configured to, for the first CSI process, obtain a target reference signal resource from the K reference signal resources, and obtain a target interference measurement resource from the M interference measurement resources;
obtaining CSI according to the target reference signal resource and the target interference measurement resource;
a transmitter 520, configured to transmit the CSI, where the CSI includes a target index, and the target index is used to characterize the target reference signal resource and/or the target interference measurement resource.
It should be noted that the receiver 500 may also perform other operations performed by the receiving unit 50, the processor 510 may also perform other operations performed by the processing unit 51, and the transmitter 520 may also perform other operations performed by the transmitting unit 52.
Referring to fig. 6A, a transmitting end is further proposed, which includes a transmitting unit 60 and a receiving unit 61, where:
a sending unit 60, configured to send CSI process configuration information, where the CSI process configuration information includes at least one CSI process, and a first CSI process of the at least one CSI process is associated with K reference signal resources and M interference measurement resources, respectively;
a receiving unit 61, configured to receive the CSI, where the CSI includes a target index, where the target index is used to characterize the target reference signal resource and/or the target interference measurement resource, the CSI is obtained according to the target reference signal resource and the target interference measurement resource, and the target interference measurement resource is obtained according to the target reference signal resource obtained from the K reference signal resources and according to the M interference measurement resources.
Optionally, the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
Further, the sending unit 60 is further configured to send a measurement mode indication, so that the receiving end obtains a mode used when obtaining the CSI according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
Optionally, for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, the position of the RE of the first reference signal resource is indicated by K second reference signal resources, and the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
Optionally, the K is related to a length of an orthogonal spreading code used by the first reference signal resource and/or a spreading manner of the first reference signal resource.
Optionally, if the length of the orthogonal spreading code used by the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the second reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
Referring to fig. 6B, a transmitting end is further proposed, which includes a transmitter 600 and a receiver 610, where:
a transmitter 600, configured to transmit CSI process configuration information, where the CSI process configuration information includes at least one CSI process, and a first CSI process of the at least one CSI process is associated with K reference signal resources and M interference measurement resources, respectively;
a receiver 610, configured to receive the CSI, where the CSI includes a target index, and the target index is used to characterize the target reference signal resource and/or the target interference measurement resource, where the CSI is obtained according to the target reference signal resource and the target interference measurement resource, and the target interference measurement resource is obtained according to a target reference signal resource obtained from the K reference signal resources and according to the M interference measurement resources.
It should be noted that the transmitter 600 may also perform other operations performed by the transmitting unit 60. The receiver 610 may also perform other operations performed by the receiving unit 61.
Referring to fig. 7A, a transmitting end is further proposed, which includes a receiving unit 70, a processing unit 71, and a transmitting unit 72, where:
a receiving unit 70, configured to obtain resource configuration information of a first reference signal, and obtain the first reference signal according to the resource configuration information, where the number of ports corresponding to the first reference signal is X, where X is a positive integer greater than 8, the first reference signal is configured with orthogonal spreading codes of different lengths, or the first reference signal is configured with orthogonal spreading codes of the same length, and spreading manners corresponding to each orthogonal spreading code in the orthogonal spreading codes of the same length are different;
a processing unit 71, configured to perform channel measurement according to the first reference signal, and determine channel state information CSI;
a sending unit 72, configured to send the CSI.
Optionally, the resource location of the first reference signal is indicated by resource locations of K second reference signals, and the number of ports corresponding to each of the K second reference signals is NkSaid N iskIs a positive integer of 1 or more and 8 or less, X is equal to K and NkThe product of (a).
Optionally, when the length of the orthogonal spreading code is 4, the set of configurations corresponding to the second reference signal is a first set, and when the length of the orthogonal spreading code is 2, the set of configurations corresponding to the second reference signal is a second set, where the second set includes the first set.
Optionally, when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals. For the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
Optionally, when the length of the orthogonal spreading code is 2, the number of adjacent orthogonal frequency division multiplexing OFDM symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and the occupied 4 OFDM symbols are not greater than 3 OFDM symbols.
Optionally, when the length of the orthogonal spreading code is 4, a sequence generation manner of the first reference signal is as follows:
Figure GPA0000243039860000141
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
Referring to fig. 7B, there is also provided a transmitting end including a receiver 700, a processor 710, and a transmitter 720, wherein:
a receiver 700, configured to obtain resource configuration information of a first reference signal, and obtain the first reference signal according to the resource configuration information, where the number of ports corresponding to the first reference signal is X, where X is a positive integer greater than 8, the first reference signal is configured with orthogonal spreading codes of different lengths, or the first reference signal is configured with orthogonal spreading codes of the same length, and spreading manners corresponding to each orthogonal spreading code in the orthogonal spreading codes of the same length are different;
a processor 710, configured to perform channel measurement according to the first reference signal, and determine channel state information CSI;
a transmitter 720 for transmitting the CSI.
Referring to fig. 8A, a receiving end is further proposed, which includes a sending unit 80 and a receiving unit 81, wherein: a sending unit 80, configured to send resource configuration information of a first reference signal, where the number of ports corresponding to the first reference signal is X, where X is a positive integer greater than 8, the first reference signal is configured with orthogonal spreading codes of different lengths, or the first reference signal is configured with orthogonal spreading codes of the same length, and spreading manners corresponding to each orthogonal spreading code in the orthogonal spreading codes of the same length are different;
a receiving unit 81, configured to receive the CSI.
Optionally, the resource location of the first reference signal is indicated by resource locations of K second reference signals, and the number of ports corresponding to each of the K second reference signals is NkSaid N iskIs a positive integer of 1 or more and 8 or less, X is equal to K and NkThe product of (a).
Optionally, when the length of the orthogonal spreading code is 4, the set of configurations corresponding to the second reference signal is a first set, and when the length of the orthogonal spreading code is 2, the set of configurations corresponding to the second reference signal is a second set, where the second set includes the first set.
Optionally, when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals. For the first CSI-RS with the spreading code length of 4, the RE position is not indicated in a mode of combining the second CSI-RS resources with the spreading code length of 2 or more.
Optionally, when the length of the orthogonal spreading code is 2, the number of adjacent orthogonal frequency division multiplexing OFDM symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and the occupied 4 OFDM symbols are not greater than 3 OFDM symbols.
Optionally, when the length of the orthogonal spreading code is 4, a sequence generation manner of the first reference signal is as follows:
Figure GPA0000243039860000151
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
Referring to fig. 8B, a receiving end is further proposed, which includes a transmitter 800 and a receiver 810, wherein:
a transmitter 800, configured to transmit resource configuration information of a first reference signal, where the number of ports corresponding to the first reference signal is X, where X is a positive integer greater than 8, and the first reference signal is configured with orthogonal spreading codes of different lengths, or the first reference signal is configured with orthogonal spreading codes of the same length, and spreading manners corresponding to each orthogonal spreading code in the orthogonal spreading codes of the same length are different;
a receiver 810 for receiving the CSI.
With the development of communication technology, the number of ports of the antenna is increasing, the number of ports corresponding to the reference signal is already greater than 8,
referring to fig. 3, in an embodiment of the present invention, a method for sending CSI is provided, where the flow is as follows:
step 300: the method comprises the steps that terminal equipment obtains resource configuration information of a first reference signal, and obtains the first reference signal according to the resource configuration information, the number of ports corresponding to the first reference signal is X, the X is a positive integer larger than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to the orthogonal spread spectrum codes in the orthogonal spread spectrum codes with the same length are different;
step 310: the terminal equipment performs channel measurement according to the first reference signal and determines Channel State Information (CSI);
step 320: and the terminal equipment sends the CSI.
In this embodiment of the present invention, optionally, the resource location of the first reference signal is indicated by resource locations of K second reference signals, and the number of ports corresponding to each of the K second reference signals is NkSaid N iskIs a positive integer of 1 or more and 8 or less, X is equal to K and NkThe product of (a).
For example, when the number of ports corresponding to the first reference signal is 16, the resource location of the first reference signal may be indicated by the resource locations of 2 second reference signals, and at this time, the number of ports corresponding to each second reference signal is 8; or, the resource location of the first reference signal may be indicated by resource locations of 4 second reference signals, where the number of ports corresponding to each second reference signal is 4; alternatively, the resource location of the first reference signal may be indicated by resource locations of 8 second reference signals, and at this time, the number of ports corresponding to each second reference signal is 2.
In the case that the number of ports corresponding to the first reference signal is 16, the resource location of the first reference signal is indicated by the resource locations of 2 second reference signals, and all of the ports corresponding to 2 second reference signals are 8, the configurations of the second reference signals in table 1 are 5, and the configurations of the 2 second reference signals in this example are two in table 1, for example, (k ', l') is (9, 5), (11, 2); or, (k ', l') is (9, 2), (11, 2).
For another example, when the number of ports corresponding to the first reference signal is 32, the resource location of the first reference signal can be indicated by the resource locations of 4 second reference signals, and at this time, the number of ports corresponding to each second reference signal is 8; or, the resource location of the first reference signal may be indicated by resource locations of 8 second reference signals, where the number of ports corresponding to each second reference signal is 4; alternatively, the resource location of the first reference signal may be indicated by the resource locations of 16 second reference signals, and at this time, the number of ports corresponding to each second reference signal is 2.
The above description is given by taking the number of ports corresponding to the first reference signal as 16 and 32 as examples, but it is needless to say that the number of ports corresponding to the first reference signal may be other values in practical applications, and will not be described in detail here.
In this embodiment of the present invention, optionally, when the length of the orthogonal spreading code is 4, the set of configurations corresponding to the second reference signal is a first set, and when the length of the orthogonal spreading code is 2, the set of configurations corresponding to the second reference signal is a second set, where the second set includes the first set.
For example, when the number of ports corresponding to the first reference signal is 16, the resource location of the first reference signal is indicated by the resource locations of 2 second reference signals, and the number of ports corresponding to 2 second reference signals is 8, the second reference signals in table 1 are configured in 5, and the configuration of 2 second reference signals in this example is configured in two in table 1, for example, (k ', l') is (9, 5), (11, 2); or (k ', l') is (9, 2), (11, 2), where when the length of the orthogonal spreading code is 2, there are 10 configurations corresponding to the second reference signal, that is, the second set includes 10 configurations, the length of the orthogonal spreading code is 4, the set of configurations corresponding to the second reference signal is the first set, and the configuration included in the first set is one or two of the 10 configurations, it should be noted that due to the limitation of spreading when the length of the orthogonal spreading code is 4, the positions of the 4 resource elements to be spread are required to be as close as possible. E.g. only as in fig. 3B
Figure GPA0000243039860000171
The resource element represented and the resource element represented by □, or only the resource element represented by □.
In this embodiment of the present invention, when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals. For the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
In the embodiment of the present invention, when the length of the orthogonal spreading code is 2, the number of adjacent OFDM symbols occupied by the first reference signal is less than or equal to 2, and in the embodiment shown in fig. 3B, the first reference signal may only be a resource element represented by □; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and the occupied 4 OFDM symbols are not greater than 3 OFDM symbols.
In this embodiment of the present invention, when the length of the orthogonal spreading code is 4, a sequence generation method of the first reference signal is as follows:
Figure GPA0000243039860000181
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims (46)

1. A method for feeding back Channel State Information (CSI), comprising:
a receiving end receives CSI process configuration information, wherein the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources;
the receiving end obtains target reference signal resources from the K reference signal resources and target interference measurement resources according to the M interference measurement resources aiming at the first CSI process;
obtaining CSI according to the target reference signal resource and the target interference measurement resource;
the receiving end sends the CSI, wherein the CSI comprises a target index, and the target index is used for representing the target reference signal resource and/or the target interference measurement resource;
for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, indicating the location of the RE of the first reference signal resource through K second reference signal resources, where the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
2. The method of claim 1, wherein obtaining a target reference signal resource from the K reference signal resources comprises:
selecting a target reference signal resource from the K reference signal resources;
obtaining target interference measurement resources according to the M interference measurement resources, including:
selecting a target interference measurement resource from the M interference measurement resources; or taking the average value of the M interference measurement resources as a target interference measurement resource.
3. The method of claim 1 or 2, wherein the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
4. The method of any of claims 1-2, wherein prior to obtaining CSI based on the target reference signal resource and the target interference measurement resource, further comprising:
and receiving a measurement mode indication sent by a base station, and acquiring a mode adopted when CSI is acquired according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
5. The method of claim 1, wherein the K is related to a length of an orthogonal spreading code employed by the first reference signal resource and/or a spreading pattern of the first reference signal resource.
6. The method of claim 1 or 5, wherein if the length of the orthogonal spreading code used for the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
7. A method for feeding back Channel State Information (CSI), comprising:
a sending end sends CSI process configuration information, wherein the CSI process configuration information comprises at least one CSI process, and a first CSI process in the at least one CSI process is respectively associated with K reference signal resources and M interference measurement resources;
the sending end receives the CSI, wherein the CSI comprises a target index, the target index is used for representing a target reference signal resource and/or a target interference measurement resource, the CSI is obtained according to the target reference signal resource and the target interference measurement resource, and the target interference measurement resource is obtained according to the target reference signal resource obtained from the K reference signal resources and the M interference measurement resources;
for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, indicating the location of the RE of the first reference signal resource through K second reference signal resources, where the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
8. The method of claim 7, wherein the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
9. The method of claim 7 or 8, wherein before the transmitting end receives the CSI, further comprising:
and the sending end sends a measurement mode indication so that the receiving end obtains the mode adopted when the CSI is obtained according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
10. The method of claim 7, wherein the K is related to a length of an orthogonal spreading code employed by the first reference signal resource and/or a spreading pattern of the first reference signal resource.
11. The method according to claim 7 or 10, wherein if the length of the orthogonal spreading code used for the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
12. A method for feeding back Channel State Information (CSI), comprising:
a sending end acquires resource configuration information of a first reference signal, and acquires the first reference signal according to the resource configuration information, wherein the number of ports corresponding to the first reference signal is X, the X is a positive integer greater than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to each orthogonal spread spectrum code in the orthogonal spread spectrum codes with the same length are different;
the sending end carries out channel measurement according to the first reference signal and determines Channel State Information (CSI);
and the sending end sends the CSI.
13. The method of claim 12, wherein the resource location of the first reference signal is indicated by resource locations of K second reference signals, the number of ports corresponding to each of the K second reference signals is Nk, the Nk is a positive integer greater than or equal to 1 and less than or equal to 8, and X is equal to a product of K and Nk.
14. The method of claim 13, wherein the set of configurations corresponding to the second reference signal is a first set when the length of the orthogonal spreading code is 4, and wherein the set of configurations corresponding to the second reference signal is a second set when the length of the orthogonal spreading code is 2, wherein the second set comprises the first set.
15. The method of claim 13, wherein when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals; for the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
16. The method according to claim 13, wherein when the length of the orthogonal spreading code is 2, the number of adjacent OFDM symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and an interval of the occupied 4 OFDM symbols is not greater than 3 OFDM symbols.
17. The method according to any one of claims 12, 13, and 15-16, wherein when the length of the orthogonal spreading code is 4, the sequence of the first reference signal is generated by:
Figure FDA0002458223640000031
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
18. A method for feeding back Channel State Information (CSI), comprising:
a receiving end sends resource configuration information of a first reference signal, the number of ports corresponding to the first reference signal is X, the X is a positive integer greater than 8, the first reference signal is configured with orthogonal spread spectrum codes with different lengths, or the first reference signal is configured with orthogonal spread spectrum codes with the same length, and the spread spectrum modes corresponding to each orthogonal spread spectrum code in the orthogonal spread spectrum codes with the same length are different;
and the receiving end receives the CSI.
19. The method of claim 18, wherein the resource location of the first reference signal is indicated by resource locations of K second reference signals, the number of ports corresponding to each of the K second reference signals is Nk, the Nk is a positive integer greater than or equal to 1 and less than or equal to 8, and X is equal to a product of K and Nk.
20. The method of claim 19, wherein the set of configurations corresponding to the second reference signal is a first set when the length of the orthogonal spreading code is 4, and wherein the set of configurations corresponding to the second reference signal is a second set when the length of the orthogonal spreading code is 2, wherein the second set comprises the first set.
21. The method of claim 19, wherein when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals; for the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
22. The method of claim 19, wherein when the length of the orthogonal spreading code is 2, the number of adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and an interval of the occupied 4 OFDM symbols is not greater than 3 OFDM symbols.
23. The method according to any one of claims 18, 19, and 21-22, wherein when the length of the orthogonal spreading code is 4, the sequence of the first reference signal is generated by:
Figure FDA0002458223640000032
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
24. A receiving end, comprising:
a receiving unit, configured to receive CSI process configuration information, where the CSI process configuration information includes at least one CSI process, and a first CSI process of the at least one CSI process is associated with K reference signal resources and M interference measurement resources, respectively;
a processing unit, configured to, for the first CSI process, obtain a target reference signal resource from the K reference signal resources, and obtain a target interference measurement resource from the M interference measurement resources;
obtaining CSI according to the target reference signal resource and the target interference measurement resource;
a sending unit, configured to send the CSI, where the CSI includes a target index, and the target index is used to characterize the target reference signal resource and/or the target interference measurement resource;
for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, indicating the location of the RE of the first reference signal resource through K second reference signal resources, where the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
25. The receiving end according to claim 24, wherein when the processing unit obtains the target reference signal resource from the K reference signal resources, specifically:
selecting a target reference signal resource from the K reference signal resources;
when the processing unit obtains the target interference measurement resource according to the M interference measurement resources, the method specifically includes:
selecting a target interference measurement resource from the M interference measurement resources; or taking the average value of the M interference measurement resources as a target interference measurement resource.
26. The receiving end according to claim 24 or 25, wherein the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
27. The receiving end according to any of claims 24-25, wherein the receiving unit is further configured to:
and receiving a measurement mode indication sent by a base station, and acquiring a mode adopted when CSI is acquired according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
28. The receiver of claim 24, wherein K is related to a length of an orthogonal spreading code used for the first reference signal resource and/or a spreading scheme of the first reference signal resource.
29. The receiving end according to claim 24 or 28, wherein if the length of the orthogonal spreading code used for the first reference signal resource is 2, and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
30. A transmitting end, comprising:
a sending unit, configured to send CSI process configuration information, where the CSI process configuration information includes at least one CSI process, and a first CSI process of the at least one CSI process is associated with K reference signal resources and M interference measurement resources, respectively;
a receiving unit, configured to receive the CSI, where the CSI includes a target index, and the target index is used to characterize a target reference signal resource and/or a target interference measurement resource, where the CSI is obtained according to the target reference signal resource and the target interference measurement resource, and the target interference measurement resource is obtained according to the target reference signal resource obtained from the K reference signal resources and according to the M interference measurement resources;
for a first reference signal resource of the K reference signal resources, if the number of ports corresponding to the first reference signal resource is greater than 8, indicating the location of the RE of the first reference signal resource through K second reference signal resources, where the total number of ports corresponding to the K second reference signal resources is greater than or equal to 8.
31. The transmit end of claim 30, wherein the target index is an index of the target reference signal resource and/or an index of the target interference measurement resource; or
The target index is a joint index generated according to the index of the target reference signal resource and the index of the target interference measurement resource.
32. The transmitting end according to claim 30 or 31, wherein the transmitting unit is further configured to transmit a measurement mode indication, so that a receiving end acquires a mode used when obtaining CSI according to the target reference signal resource and the target interference measurement resource according to the measurement mode indication.
33. The transmitting end of claim 30, wherein the K is related to a length of an orthogonal spreading code employed by the first reference signal resource and/or a spreading manner of the first reference signal resource.
34. The transmitting end according to claim 30 or 33, wherein if the length of the orthogonal spreading code used for the first reference signal resource is 2 and K is greater than or equal to 1, the position of the RE of the first reference signal resource is indicated by the reference signal resource after the combination of K second reference signal resources;
if the length of the orthogonal spreading code used by the first reference signal resource is 4, K is equal to 1.
35. A transmitting end, comprising:
a receiving unit, configured to obtain resource configuration information of a first reference signal, and obtain the first reference signal according to the resource configuration information, where the number of ports corresponding to the first reference signal is X, where X is a positive integer greater than 8, the first reference signal is configured with orthogonal spreading codes of different lengths, or the first reference signal is configured with orthogonal spreading codes of the same length, and spreading manners corresponding to each orthogonal spreading code in the orthogonal spreading codes of the same length are different;
the processing unit is used for carrying out channel measurement according to the first reference signal and determining Channel State Information (CSI);
a transmitting unit, configured to transmit the CSI.
36. The transmitting end of claim 35, wherein the resource location of the first reference signal is indicated by resource locations of K second reference signals, the number of ports corresponding to each of the K second reference signals is Nk, the Nk is a positive integer greater than or equal to 1 and less than or equal to 8, and X is equal to a product of the K and the Nk.
37. The transmitting end according to claim 36, wherein the set of configurations corresponding to the second reference signal is a first set when the length of the orthogonal spreading code is 4, and the set of configurations corresponding to the second reference signal is a second set when the length of the orthogonal spreading code is 2, and the second set includes the first set.
38. The transmitting end of claim 36, wherein when the length of the orthogonal spreading code is 2, K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals; for the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
39. The transmitting end according to claim 36, wherein when the length of the orthogonal spreading code is 2, the number of adjacent OFDM symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and an interval of the occupied 4 OFDM symbols is not greater than 3 OFDM symbols.
40. The transmitting end according to any of claims 35, 36 and 38-39, wherein when the length of the orthogonal spreading code is 4, the sequence of the first reference signal is generated by:
Figure FDA0002458223640000051
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
41. A receiving end, comprising:
a sending unit, configured to send resource configuration information of a first reference signal, where the number of ports corresponding to the first reference signal is X, where X is a positive integer greater than 8, the first reference signal is configured with orthogonal spreading codes of different lengths, or the first reference signal is configured with orthogonal spreading codes of the same length, and spreading manners corresponding to each orthogonal spreading code in the orthogonal spreading codes of the same length are different;
a receiving unit, configured to receive CSI.
42. The receiving end of claim 41, wherein the resource location of the first reference signal is indicated by resource locations of K second reference signals, the number of ports corresponding to each of the K second reference signals is Nk, the Nk is a positive integer greater than or equal to 1 and less than or equal to 8, and X is equal to a product of the K and the Nk.
43. The receiving end of claim 42, wherein the set of configurations corresponding to the second reference signal is a first set when the length of the orthogonal spreading code is 4, and the set of configurations corresponding to the second reference signal is a second set when the length of the orthogonal spreading code is 2, and the second set comprises the first set.
44. The receiving end according to claim 42, wherein when the length of the orthogonal spreading code is 2, the K is greater than 1, and the resource of the first reference signal is a combination of resources of K second reference signals; for the first CSI-RS with the spreading code length of 4, K is 1, and the RE position is not indicated by the way of the second CSI-RS resource combination which is greater than or equal to 2.
45. The receiving end according to claim 42, wherein when the length of the orthogonal spreading code is 2, the number of adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the first reference signal is less than or equal to 2; or, when the first reference signal occupies 4 adjacent OFDM symbols, resource elements occupied by one spreading code are on the same subcarrier, and an interval of the occupied 4 OFDM symbols is not greater than 3 OFDM symbols.
46. The receiving end according to any of claims 41, 42 and 44-45, wherein when the length of the orthogonal spreading code is 4, the sequence generation method of the first reference signal is as follows:
Figure FDA0002458223640000061
sequence symbols mapped by the same port in two adjacent subcarriers in the same OFDM symbol in the same PRB are the same.
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